My Tribeca is leaking power steering fluid pretty bad. I checked the pump , resivour, lines, and none of these are the reason. I noticed when checking the pressure line that it is leaking above this. I noticed there is a rubber cap that looked like it should be sealed isn’t. I touched it and it gushed fluid out. It isn’t one of the boots and it connects to the steering knuckle further up. I cannot find it on any diagrams . I need to know what this part is called and what is required to fix it. I fix my own cars and am Leary of taking it to a mechanic and the nearest Subaru dealer is 100 miles away. If anyone can help me identify the part that is leaking it would be most appreciated.